[FL-2430] Automatic Desktop Locking (#1101)

* Add Auto Lock Time setting
* Update .gitignore
* Add value_index toolbox module
* Auto locking basic implementation
* Better AutoLock implementation, edge cases and cleanup
* Fix NULL pointer crash
* Turn off backlight shortly in locked mode
* Re-enable auto lock after pin lock
* Correctly handle start when pin locked
* Use timer to hide locked hint
* Use a single state variable instead of multiple bools
* Do not call update callback recursively
* Allow input when the Unlocked hint is shown
* Add a delay to backlight switch off while locking
* Better user input handling
* Switch backlight off after pin timeout
* Correct grammar in notification settings

Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f7/furi_hal/furi_hal_delay.c

@@ -26,6 +26,10 @@ uint32_t furi_hal_get_tick(void) {
     return tick_cnt;
 }
 
+uint32_t furi_hal_ms_to_ticks(float milliseconds) {
+    return milliseconds / (1000.0f / osKernelGetTickFreq());
+}
+
 void furi_hal_delay_us(float microseconds) {
     uint32_t start = DWT->CYCCNT;
     uint32_t time_ticks = microseconds * furi_hal_delay_instructions_per_microsecond();

firmware/targets/furi_hal_include/furi_hal_delay.h

@@ -31,6 +31,13 @@ void furi_hal_tick(void);
  */
 uint32_t furi_hal_get_tick(void);
 
+/** Convert milliseconds to ticks
+ *
+ * @param[in]   milliseconds    time in milliseconds
+ * @return      time in ticks
+ */
+uint32_t furi_hal_ms_to_ticks(float milliseconds);
+
 /** Delay in milliseconds
  * @warning    Cannot be used from ISR
  *